Developing trays



Aug. 18, 1931. c, BE|DLER 1,819,536

DEVELOPING TRAY Filed Nov. 12, 1930 2 Sheets-Sheet 1 INVENTOR, a c M ATTORNEY.

Aug. 18, 1931. G. c. BEIDLER DEVELOPING TRAY 2 Sheet-Sheet 2 Filed NOV. 12, 1930 rl l l i l Hl l l l l l l l HH A II ATTORNEY.

Patented Aug. 1 8, 1931 PAT GEORGE o. BEIDLEB, or ROCHESTER, ,NEW YORK DEVELOPING" TRAYS Application filed November 12, 1930: Serial No. 495,237;

This invention relates to photographic developing apparatus, and it has for an object the provision of means preferably associated with a receptacle for photographic 6 developer for flexing film to increase its rigidity; more specifically the subject thereof is an improvement on coil-form film holders of the general type of those on V which I have secured patents numbered *1,346,780 dated July 13, 1920 and 1,664,731

dated April 3, 1928.

1 Anobject of this invention is to provide a coil-form film holder of the type indicated in which the film will be more readily inserte'd' in the coil.

Under certain conditions, film which is flimsy or of large size does not pass into the developing tray or coil so readily, and

I I have found that by causing the film to buckle slightly or bend transversely greater resistance is produced and the force exerted for inserting it in the film holder is more effective in causing the film to travel into developer contained in the receptacle.

It is an object of the invention furthermore to provide a film holder of the general character comprising sections connected together in novel manner and provided with ribs to which sections are anchored to afford strength and durability.

, .With the foregoing and otherobjects in view, the invention consists in the details of construction, and in the arrangement and ,combination of parts to be hereinafter more fully set forth and claimed. In describing the invention in detail, ref erence will be had to the accompanying drawings forming part of this application, wherein like characters denote corresponding parts in the several views, and in which- Figure 1 illustrates a plan View of a film holder embodying the invention;

Figure 2 illustrates a view in front elevation of a fragment of one of the members of the coil,

Figure 3 illustrates a view in elevation of one of the plates to which sections of the (30 film holder are attached;

Figure 4 illustrates an endv elevation of the filmholder;

Figure 5' illustrates a sectional View onthe line 55 of' Fig. 4;

Figure 6 illustrates a sectional View on the line 6-6 of Fig; 4; and

Figure 7 illustrates a sectionalview of: a plate employed in producing the film dis torting rib.

In these drawings 10 denotes a plurality" of plates each having a'straight upper edge, except for the projection ll'near one" edge, the said plate having its under edge curved, as at 12, to engage one of the sectionsjlli of the coil'film holder.. It is shown in the drawings that the plate" has a depending portion 14' atone end and that the edge of said depending portion is slightlyv curved to engage the outer surface of a coil mem-' ber 15. The coil member is securedto the plurality of plates by suitable means such as soldering or't'he like, and at the junction of the curved portion 12 of the plate and the said depending "portion, the plate has a slot 16 in which the edge of the coil member 13 is seated. Owing to the fact-that the member 13 is secured to the plate along its curved edge and that the edge of the member is furthermore secured in the seats of the." plate, a rugged constructionresultsi The member l3'is, of course, the inne'rcoil or convolution of the coil, it being shown thatthe members 13'and 15 are separated, one fromlf the other;

, The member 15, however, is connectedf'to' an outer member 17 of the coil, as isfseen, by joints 18 which are interposed between the upper surface of'the member '15 at' its outer edge and the under surface of themember' 17 at its inher"edge. These oints are pref erably produced by solder or other-such fusible material and they result in' holding the members in spaced relation to eachother in orderthata passage is formed between the two members. end of'the member 15'whi'ch is attached to. the plate is in'spaced relation to themember 13 where it enters the 'slotfof the 'pl atean'cl the openings" thus" produced between the members and the plates permit air to pass It is seen also thatfthe;

into and out of the coil as the film is being inserted and removed.

The spaces 19 also permit fluid and air to circulate freely while film is being moved with relation to the coil.

The inner surface of the member 17 which projects upwardly in spaced relation to the edges of the plates constitutes What may be regarded as an apron that serves to guide film into the coil.

In order to cause the film to bend or buckle transversely to produce the stiffening effect to which reference has been made, the inner surface of the member 17 is supplied with a rib-like guide formed, in the present embodiment of the invention, by utilizing a plate 20 and bending it transversely. The plate is elliptical and it is elongated to an extent as to extend from the upper edge of the member 17 a considerable distance toward the inner end of said. member. The plate is bent rather abruptly to form a rib which extends beyond the plane oi the surface of the member 17 and this results in distorting the paper in the manner described. In other words, the plate is elongated in the direction of travel of film as it is delivered to the developing instrumentality and it is convex transversely.

I claim:

1. In a photographing and developing apparatus, a receptacle for developing fluid, and a guide associated therewith operative to flex film laterally of the direction or" its movement into the receptacle.

2. In a photographing and developing apparatus, a receptacle for developing fluid, and a transversely convex rib elongated in the direction of travel of film entering the said receptacle.

3. In a photographing and developing apparatus, a receptacle for developing fluid, a guiding device for film delivered to the receptacle, and a rib-like film flexing element on the guide.

l. In a photographing and developing apparatus, a receptacle for developing fluid, a guiding device for film delivered to the receptacle, and a rib-lilre film flexing element on the guide, said flexing device being elongated in the direction of movement of the film as it is delivered to the receptacle.

5. In a photographing and developing apparatus, a receptacle for developing fluid, a film guide associated therewith, a transversely convex plate on said guide, said plate being elongated in the direction of travel of film entering the receptacle.

6. In a photographing and developing apparatus, a receptacle for developing fluid, a film guide associated therewith, and atransversely convex flexing element on the guide, said element being elongated in the direction of travel of film entering the receptacle.

7. In a photographing and developing apparatus, a receptacle for developing fluid, a coil-form film holder therein having a portion operative to guide film thereto, and means on the said guiding portion adapted to be engaged by the film and operative to flex said film transversely.

8. In a photographing and developing apparatus, a receptacle for developing fluid, a coil-form film holder therein having a portion operative to guide film thereto, a trans versely convex plate on said guiding portion,

aid plate being elongated in the direction of travel of the film entering the receptacle.

9. A coil-form film holder, a plurality of plates, each having a curved lower edge, a curved section of a film holder secured to said curved edges, a depending portion at one end of each plate having a recess at its point of merger with said plate in which an edge of the curved section is secured, another curved section of said film holder having its side at one edge secured to the edge of the depending portion of each plate in spaced relation to the first mentioned curved section, and another curved section having its side at its inner edge secured in spaced relation to the side of the second mentioned section at its outer edge.

10. A coil-form film holder, a plurality of plates, each having a curved lower edge, a curved section of a film holder secured to said curved edges, a depending portion at one end of each plate having a recess at its point of merger with said plate in which an edge of the curved section is secured, another curved section of said film holder having its side atone edge secured to the GEORGE C. BEIDLER. 

